content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * ---------------------------
   * DefaultPieDatasetTests.java
   * ---------------------------
   * (C) Copyright 2003-2013, by Object Refinery Limited and Contributors.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes
   * -------
   * 18-Aug-2003 : Version 1 (DG);
   * 31-Jul-2006 : Added test for new clear() method (DG);
   * 01-Aug-2006 : Added testGetKey() and testGetIndex() methods (DG);
   *
   */
  
  package org.jfree.data.general;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNotSame;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertSame;
  import static org.junit.jupiter.api.Assertions.fail;
  
  import java.io.IOException;
  import org.jfree.chart.TestUtilities;
  import org.jfree.data.UnknownKeyException;
  import org.junit.jupiter.api.Test;
  
  ;
  
  /**
   * Tests for the {@link org.jfree.data.general.PieDataset} class.
   */
  public class DefaultPieDatasetTest implements DatasetChangeListener {
  
      private DatasetChangeEvent lastEvent;
  
      /**
       * Records the last event.
       *
       * @param event  the last event.
       */
      @Override
      public void datasetChanged(DatasetChangeEvent event) {
          this.lastEvent = event;
      }
  
      private static final double EPSILON = 0.00000001;
      
      @Test
      public void testGetValue() {
          DefaultPieDataset d = new DefaultPieDataset();
          d.setValue("A", 5.0);
          assertEquals(5.0, d.getValue("A").doubleValue(), EPSILON);
          
          // fetching the value for a key that does not exist
          try {
              d.getValue("KEY_THAT_DOES_NOT_EXIST");
              fail("Expected an UnknownKeyException.");
          } catch (UnknownKeyException e) {
              // expected in this case
          }
          
      }
      
      /**
       * Some tests for the clear() method.
       */
      @Test
      public void testClear() {
          DefaultPieDataset d = new DefaultPieDataset();
          d.addChangeListener(this);
          // no event is generated if the dataset is already empty
          d.clear();
          assertNull(this.lastEvent);
          d.setValue("A", 1.0);
          assertEquals(1, d.getItemCount());
          this.lastEvent = null;
          d.clear();
          assertNotNull(this.lastEvent);
          assertEquals(0, d.getItemCount());
      }
  
      /**
       * Some checks for the getKey(int) method.
       */
      @Test
      public void testGetKey() {
          DefaultPieDataset d = new DefaultPieDataset();
          d.setValue("A", 1.0);
          d.setValue("B", 2.0);
          assertEquals("A", d.getKey(0));
          assertEquals("B", d.getKey(1));
  
          try {
              d.getKey(-1);
              fail("IndexOutOfBoundsException should have been thrown on negative key");
          }
          catch (IndexOutOfBoundsException e) {
              assertEquals("Index -1 out of bounds for length 2", e.getMessage());
          }
  
          try {
              d.getKey(2);
              fail("IndexOutOfBoundsException should have been thrown on key out of range");
          }
          catch (IndexOutOfBoundsException e) {
              assertEquals("Index 2 out of bounds for length 2", e.getMessage());
          }
      }
  
      /**
       * Some checks for the getIndex() method.
       */
      @Test
      public void testGetIndex() {
          DefaultPieDataset d = new DefaultPieDataset();
          d.setValue("A", 1.0);
          d.setValue("B", 2.0);
          assertEquals(0, d.getIndex("A"));
          assertEquals(1, d.getIndex("B"));
          assertEquals(-1, d.getIndex("XX"));
  
          try {
              d.getIndex(null);
              fail("IllegalArgumentException should have been thrown on null key");
          }
          catch (IllegalArgumentException e) {
              assertEquals("Null 'key' argument.", e.getMessage());
          }
      }
  
      /**
       * Confirm that cloning works.
       */
      @Test
      public void testCloning() throws CloneNotSupportedException {
          DefaultPieDataset d1 = new DefaultPieDataset();
          d1.setValue("V1", new Integer(1));
          d1.setValue("V2", null);
          d1.setValue("V3", new Integer(3));
          DefaultPieDataset d2 = (DefaultPieDataset) d1.clone();
          assertNotSame(d1, d2);
          assertSame(d1.getClass(), d2.getClass());
          assertEquals(d1, d2);
      }
  
      /**
       * Serialize an instance, restore it, and check for equality.
       */
      @Test
      public void testSerialization() throws IOException, ClassNotFoundException {
          DefaultPieDataset d1 = new DefaultPieDataset();
          d1.setValue("C1", Double.valueOf(234.2));
          d1.setValue("C2", null);
          d1.setValue("C3", Double.valueOf(345.9));
          d1.setValue("C4", Double.valueOf(452.7));
          DefaultPieDataset d2 = (DefaultPieDataset) TestUtilities.serialised(d1);
          assertEquals(d1, d2);
      }
  
  }
  